4-Way Air Flow Barb Hose Connector for Fish Tank, 8.3mm, Metal Product Name: Aquarium Air Valve; Material: Metal Color: Brass Tone; Connector External Diameter: 8.3mm / 0.33" Inner Diameter: 6.7mm / 0.26";Total Size: 5.1 x 5.1 x 0.93cm / 2" x 2" x 0.37"(LWT) Weight: 14g Package Content: 1 x Aquarium Air Valve